What should I check if seal strength decreases during continuous production?
• Measure actual heat-seal jaw temperature; drift over ±5°C requires PID/thermocouple check.
• Verify heat-seal pressure; replace cylinder seals if below 0.3MPa.
• Check heat-seal dwell time; faster cycle time reduces seal strength.
• Inspect film tension and cooling jaw; tension fluctuation or poor cooling prevents seal setting.
• If normal, test incoming film sealant layer thickness and coating weight batch variation.
• Verify heat-seal pressure; replace cylinder seals if below 0.3MPa.
• Check heat-seal dwell time; faster cycle time reduces seal strength.
• Inspect film tension and cooling jaw; tension fluctuation or poor cooling prevents seal setting.
• If normal, test incoming film sealant layer thickness and coating weight batch variation.